Classification / Names
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Characiformes (Characins) >
Characidae (Characins; tetras) > Stethaprioninae
Etymology: Hemigrammus: Greek, hemi = half + Greek, gramma = letter, signal (Ref. 45335); diagonicus: Name from Latin diagonicus, meaning diagonal, referring to the position of the blotch on the caudal fin, unique among the species of Hemigrammus..
Environment: milieu / climate zone / depth range / distribution range
বাস্তুসংস্থান
; স্বাদু পানি সমুদতলে ভাসমান বেনথোপেলাজিক. Tropical; 2°S - 3°S, 55°W - 57°W
South America: Brazil.
আকৃতি / ওজন / Age
Maturity: Lm ? range ? - ? cm
Max length : 2.8 cm SL পুরুষ/ লিঙ্গ অনিধর্ারিত ; (Ref. 87304)
Short description
সনাক্তকারী নির্দেশক | বহিঃ অঙ্গ সংস্থান | মরফোমেট্রিক্স
Hemigrammus diagonicus can be easily differentiated from its congeners, except for Hemigrammus silimoni, by the presence of a blotch on the caudal fin restricted to the dorsal lobe (vs. no blotches on the caudal fin, blotches restricted to the base of the rays, or blotches arranged symmetrically in dorsal and ventral lobes). Hemigrammus diagonicus is distinguished from H. silimoni by the autapomorphic presence of the caudal-fin blotch shaped like a bar that extends diagonally from the base of the median rays to the end of the upper lobe rays (vs. conspicuous ocellus like blotch on the lower region of the caudal-fin dorsal lobe); height of dorsal fin 22.3–30.2% SL (vs. 31.0–37.4% SL); length of anal-fin base 24.0–28.0% SL (vs. 28.7–31.5% SL); horizontal eye diameter 33.8–41.3% HL (vs. 43.4– 48.1% HL) (Ref. 87304).
Life cycle and mating behavior
Maturities | প্রজনন | Spawnings | Egg(s) | Fecundities | শুককীট
Mendonça, M.B. and W.B. Wosiacki, 2011. A new species of Hemigrammus from the Lower Amazon Floodplain (Characiformes: Characidae). Copeia 2011(2):211-215. (Ref. 87304)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
হাতিয়ার
Special reports
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ইন্টারনেট সুত্র
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
ট্রফিক পর্যায়ে (Ref.
69278): 3.0 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
